Hull Geological Society
Mike Horne FGS
This is unfinished work that has not been edited or peer reviewed by the Society.
Geodiversity in the Graveyard.
What
do we mean by Geodiversity? Presumably it is the variety of rocks in our local
environment. Unlike Biodiversity which can be increased through careful
management, we cannot do anything to increase the number rock types in our
natural environment. All we can do it to try to conserve the exposures that
exist; no easy task. However the variety rocks can increase anthropgenically in
the built environment and a prime example of this is in our church graveyards
and cemeteries.
Graveyards are an excellent too for geological education and sometimes
geological research. Not only can they provide examples of rack types to enable
us to teach geology they also provide links with various forms of history and
environmental issues to aid public engagement with our science. Like natural
exposures they are not a permanent resource – geoconservation is also needed in
the graveyard!
Notes
–
Safety – do not climb on or lean on the monuments – they may be unstable.
Respect – do not hammer, scratch or use acid to test the monuments.
Do
not clean the monuments without permission
Real
Geology
– If you are ever mapping or researching the geology of an area there are clues
to the local geology to be found in a graveyard:-
·
Have
a look in freshly dug grave to obtain soil and rock samples.
·
Look
at the stone used for the walls around the graveyard – they may be local
·
Have
a look at the store used for the church or memorial chapel – they might be local
·
There
might be clues about the geology in the location – e.g. it might not be sensible
to have a graveyard just above the local aquifer.
Geological education –
Pure
educational geology – can be carried out at many educational levels – from basic
recognition of igneous, sedimentary and metamorphic classes to more details
analysis of rocks and structures. There are limitations though: no hammering!
·
Identifying rock types
·
Sedimentary structures
·
Fossils
·
Igneous structures
·
Metamorphic structures
·
Folding & faulting
·
Weathering and resistance to weathering
Environmental studies – gravestones usually include a date of the death of the
deceased individual and usually the stone was erected shortly after that event.
By combining that date with the type of rock and its weathering we can make
environmental observations.
·
How
legible is the inscription?
·
Rate
of Solution of marble by acid rain – the lead lettering will not dissolve
·
Lichens on the stone
·
Spalling due to frosts and rising damp
·
Is
one side more weathered than the other?
·
Location – are gravestones under trees better protected from weathering?
We
can make comparisons between these observation between urban and rural
graveyards.
We
can engage the public or students more by posing questions such as “how long
will my gravestone last?” or “which rock type would you choose for your
memorial?”
Social and economic history
– from the variety of stones and the design of the memorials we can investigate
changes in social history and economic geography.
Economic history - Trade routes and communication – when did certain types of
exotic rock arrive in the area? The cost of the gravestone is mostly in the
labour extraction of the rock and the working of the stone plus the transport
costs.
·
Local
rocks
·
Exotic rocks brought by sea, canal, rail and road indicate the date of opening
of new transport routes
Examples – first Welsh slates might indicate the opening of the railway;
Larvikite might be more common in a port that traded with Scandinavia; rocks
from
Social history of mourning – the style of the memorial and wording of the
inscriptions has changed through time and can form an interesting study.
Shape
& design of the stone and sculptures – Examples:-
·
Skull
& crossed bones
·
Draped urns and broken columns
·
War
graves
·
Quaker cemetery
·
Soccer balls, Hearts and teddy bears
Personalised sculpture and engravings - examples
·
Life
images
·
Linked to career – locomotives, boats and anchors
·
Masonic imagery
·
Life
images – carved, photograph ceramic or laser etched
·
Hobbies - such as cricket, soccer or
angling - carved or laser etched
·
Interests – support of local sports team, Elvis or meerkats
Wording of inscriptions has changed over time and may indicate our attitude to
death, mourning and religion.
·
“here
lie the remains of”
·
“sacred to the memory of”
·
“called home”
·
“entered the homeland”
·
“passed away”
·
“fell
asleep”
·
“gone
fishing”
·
“we
miss you granny”
Social diversity –
·
Place
of birth
·
Religion
·
Language
·
Wealth & prosperity
·
Life
expectancy
Local
History – memorials to the rich and famous; records of local events and
tragedies. Examples
·
Shipwrecks, airship disasters and international incidents
·
Mass
graves and associated memorials for
cholera epidemics
·
Public funding of a memorial due to genuine respect for a local benefactor or
unsung hero or the tragic loss of a young person
·
“Important People” often wish to keep their status when they are dead with
impressive memorials in a prominent position!
Family history – a potential source of information for dates of birth, death,
relationships, place of birth, place of death, occupation &c.
Limitations –
When
visiting the site behave responsibly
·
Behaviour – show respect for the dead and their relatives
·
Biodiversity – try not to disturb flora and fauna or allow a group you are
leading to trample the area
·
No
hammering or use of acid to test limestones
Not
everyone is buried and has a memorial – poor people cannot afford it, many are
now cremated, inscriptions become unreadable, graveyards become wildernesses,
stones are moved or lost. Your researches in to local, family and social history
are statistically biased!
Other
public engagement –
Art,
design and aesthetics.
·
Beautiful rocks
·
Good
or unusual gravestone design
·
Using
the site for photography and painting
Spiritual
·
A
place of peace
·
A
tranquil oasis
·
Remembering and honouring our ancestors
·
Reflecting on our own mortality
Conservation
–
like geological exposures gravestones will not last for ever but we can help
conserve them. They are subject to some threats that can be managed – examples –
·
Vandalism
·
Weathering due to nearby trees
·
Becoming overgrown with ivy or brambles
·
Subsidence
·
Subsidence caused by tree roots
·
being
laid down due to safety
·
cars
parking on gravestone pavements
Threats to the Graveyard
·
irresponsible dog walkers
·
fly
tipping
·
reduced access to prevent these problems
Protection –
·
cooperation with site owners, managers, caretakers and wardens
·
cooperation with local authority planning and conservation officers
·
listed building status
·
RIGS
or local geological sites or geological reserve
·
Cooperation with “Friends of the …” group
·
SSSI
or Nature Reserve
·
Cooperation with wildlife or other groups
·
Using
the site responsibly and public engagement – if members of the public value the
site then they will want to help protect it.
Increasing Geodiversity
– can geologists work with site owners and memorial companies to encourage an
increase in geodiversity? Or does that conflict with the concepts of
preservation of local character? I have heard of some church graveyards banning
Carrara Marble gravestones and words like “Nanna” from the inscriptions.
Warning
- One
last thing to be aware of if you lead a geological walk around a graveyard is
there will nearly always be someone there that expects you to know where Aunty
Edna is buried!
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